中文摘要：

The present study aims at developing a new method--Random Microstructure Finite Element Method (RMFEM) for the effective properties of com posite materials.In this method, a random microstructure model is used to simulate the microstructure of the real composite materials.The physical fields in such a random microstructure model under specified boundary and initial conditions are analyzed by finite element method.The effective properties of composite materials can be obtained from the analysis results.As verification, some effective properties of composite materials, such as elastic module.thermal expansion coefficient, thermal conductivity and elastoplastic properties,are investigated by random microstructure finite element method.The numerical results are given together with the experimental data.It is revealed that the random microstructure finite element method is a very valid method for the determination of the effective properties of composite materials.

英文摘要：

The present study aims at developing a new method-RandomMicrostructure Finite Element Method (RMFEM) for the effectiveproperties of com- Posite materials. In this method, a randommicrostructure Model is used to simulate the microstructure of thereal composite materials. The physical fields in such a randomMicrosturucture model under specified boundary and initial Conditionsare analyzed by finite element method.